Summary of Significant Accounting Policies (Schedule of ResponseDX Revenue) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net ResponseDX ® revenue	$ 19,801,359	$ 18,736,669
ResponseDX [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net ResponseDX ® revenue	12,011,374	11,884,133
ResponseDX [Member] | Private Payor [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net ResponseDX ® revenue	7,489,642	6,472,386
ResponseDX [Member] | Other Payor [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net ResponseDX ® revenue	0	6,354
Medicare [Member] | ResponseDX [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net ResponseDX ® revenue	$ 4,521,732	$ 5,405,393